Tesla can change so much with over-the-air updates that it’s messing with some owners’ heads

When Consumer Reports recently found that the braking distance on the Tesla Model 3 was worse than that of a Ford F-150, CEO Elon Musk took the criticism and found a solution. Days later, Tesla shipped an over-the-air update that, according to CR’s testing, improved the braking distance by 19 feet. It’s a wild idea: your car automatically downloads some code, and it’s instantly safer. It also wasn’t possible even a few years ago, and some have held it up as an ideal example of how futuristic technologies can make our lives better. Analysts said it was “unheard of.” Jake Fisher, CR’s director of auto testing (and the person who originally flagged the issue), said he’d “never seen a car that could improve its track performance with an...